Shotgun-barrel.



rn rnn r. vANnnnBosscHn, or HARRISON TOWNSHIP, MAcoMB COUNTY, MICHIGAN.

SHO'IGUN-BARREL.

Specification of Letters Patent.-

Patented Jan. 9, 1912.

Application filed February 2, 1911. Serial N 0. 606,258.

To all whom it may concern:

Be it known that I, PETER F. VANDEN- BosscHE, a citizen of the United States,- residing in the township of Harrison, county of-Macomb, State of Michigan, have -in vented a certain new and useful Improvement in Shotgun-Barrels, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in'the art to which it pertains tomake and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to shot gun barrels and its objectis a gun barrel to which may be attached other comparatively short lengths of barrel of the same or difiering choke. A shot gun provided with a barrel having a cylinder bore will scatter a charge of shot issuing therefrom while a barrel having a choke bore will throw a charge of shot in a more compact formation and to a greater distance than will a cylinder bore with the same powder charge. Consequently a single barreled g-un of any particular choke is primarily adapted for a certain class of service and is comparatively unadapted for other classes of service. The utility of the invention herein disclosedis in adapting a gun for use in various classes of service. A sportsman in a 'days travel through the country usuallyencounters condition'swhere a gun of a certain choke would do the most effective work. If the gun carried is not of that choke theresults desired are not attainable. With the arrangement of the barrel herein shown, other short lengths of barrel of the desired choke may be attached thereto and the gun there- 40 by adapt ed for service under vany of varying conditions that may be encountered. By carrying a number of these short lengths of barrel, each of a difierent degree of choke, the range of ser vice for which the gun is adapted is gre'atly increased; These and other objects and novelties of the invention are hereinafter more fully described and claimed. A means by which these objects may be accomplished is shown in the drawings in which-- Figure 1 is a perspective view of a part of a. gun barrel in which my invention is embodied. Fig. 2 is a longitudinal section thereof. Fig. 3 is a bottom View of the barrel showing the clamp by means of which the short length of barrel is secured thereto.

Similar characters refer to similar parts throughout the drawings and specification.

The mainbarrel 1 has an enlarged end 2 which is counterbored and threaded for the reception of the short length of barrel 3. The end 4 of the barrel 3 is of the exact bore of the barrel 1 and the end 5 may be of the same or smaller bore. If the end 5 is less in diameter than the end 4, with the bore gradually decreasing from one end to the other, it is What is termed choke bored and if the barrel is of the same diameter throughout its length, it is cylinder bored. The enlarged end 2 of the barrel 1 is not threaded the entire length of the counterbore and thepart not threaded is slotted onjthe under side at 6. At or near the end of the part 2 v and at each sideof the slot are lugs 7 and 8. The lug 7 is threaded and the lug 8 is bored for the reception of-the-screw 9 by means of which the auxiliary barrel?) is securely held in place. The screw 9 has ahead 1O which is provided with a lever 11 reciprocatable in an aperture in the head and bymeans of which the screw may be turned and the barrel 3 clamped in place. Otherwise the barrel 3 might become loosened in use. The counterbore of the part 2 is of the proper size to allow the auxiliary barrel to be easily inserted therein and the clamp h 'ds the two barrels in alinement.

I have found experimentally that auxiliary barrels of less thana foot in length are suflicient for the purpose herein outlined and that slight diiferences in the degree of choke in barrels of such short lengths will produce a decided difference in 'the formation of a shot charge issuing therefrom. It

is to be understood, however, that auxiliary barrels of greater length than that specified may be used if desired.

Having thus briefly described my invention and its operation, what I claim is 1. A shot gun barrel comprising a main barrel and an auxiliary barrel, the main barrel having an enlarged and contractible end integrally formed therewith adapted to receive an end of the auxiliary barrel, and means for contracting said enlarged end to maintain the barrels in fixed relation 2. A shot gun barrel comprising barrel and an auxiliarybarrel, the ina -nfbarrel having an enlarged end integrally formed therewith, said enlarged end being threaded for a. portion of its length to receive the threaded end of the auxiliary barear or lug on each side of the slot, and a screw carried by the lugs adapted tocontract the slotted portion of the enlarged end.

3. A shot gun barrel comprising a main barrel and an auxiliary barrel, the main barrel havin an enlarged end counterbored and threa ed for the reception of the auxiliary barrel, the auxiliary barrel being of a having a threaded endm'her my .it-"may'be screwed into the enlarged enc' of the main barrel, and a clamp connected with said e11- larged end whereby the barrels may be 15 maintained in axial alinement.

In testimony whereof, I sign thi'sspecification in the presence of two witnesses.

PETER F. VANDENBOSSCHE, Witnesses:

RICHARD ALsrAs, ARTHUR PI'NKAIL. 

